[1] Univ Milan, Dept Clin Sci & Community Hlth, EPIGET LAB, Milan, Italy
[2] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Milan, Italy
[3] Univ Milan, Sch Occupat Med, Milan, Italy
[4] GlaxoSmithKline Consumer Healthcare, Warren, NJ USA
[5] GlaxoSmithKline Consumer Healthcare, Nyon, Switzerland
[6] GlaxoSmithKline Consumer Healthcare, Weybridge, Surrey, England